Apparatus for casting jointed shoe lasts



March 19, 1935 G c, CLARK 1,994,573

APPARATUS FOR CASTING JOINTED SHOE LASTS Original Filed Feb. 8, 1954 2 Sheets-Sheet 1 INVENTOR.

BY GfO/QGZ' (2 Cum.

ATTORNEY.

March 19, 1935. G. c. CLARK APPARATUS FOR CASTING JOINTED SHOE LASTS 2 Sheets-Sheet 2 Original Filed Feb. 8, 19,34

INVENTOR. BY 6 OfiGfC 614M ATTORNEY.

Patented Mar. 19, 1935 FOR CASTING JOINTED snoa LASTS APPARATUS George (3. Clark, Beverly Hills, Calif.

Original application FebruaryS, 1934, Serial No. 710,280. Divided and this application October 16, 1934, Serial No. 748,521

' '2 Claims. a -r26) The invention relates toapparatus for casting jointed shoe lasts, and particularly for casting. a section of an articulated hollow metal shoe last with a joint face in finished form.

The primary object of the invention is to provide means for casting a section of. a jointed shoe I last with a finished joint face whereby the expensive operation of machining such faces is eliminated and assurance can be' had thatthe jointed members or parts of the shoe last to be cast will properly'cooperate and interfit to provide the shoe last with the required shape, contour and interfitting relation.

A further object is to provide means for casting sections of a jointed shoe last with integrally formed joint forming portions.

A further object is to provide a casting flask with a chill forming at least one face of a mold impression and a second chill operatively supported by and cooperating with said first chill'and projecting from said flask to be accessible exteriorly of said flask.- 9

A further object is to provide a casting flask with a two-part chill forming at least one face of a mold impression, and another chill 'shiftably carried and operatively positioned by said-twopart chill. l

A further object is to cast a metal member with a recess intermediate the edges of one face thereof by utilizing, in a casting flask having an impression of said metal member formed therein, a chill shiftable 'in a direction substantially perpendicularly of said face and normally extending into said impression for molding said recess in the casting operation. 7

With the above and other objects in view, the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in the drawings, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without 'departing from the V spirit of the invention.

In the drawings: 1 l I Figure l is a view in side elevation-of the shoe last to be cast. I Figure 2 is a fragmentary longitudinal vertical sectional view of the shoe last. v V

Figure 3 is a fragmentary perspective-view of the heel member of the last.

Figure 4 is a perspective view of one part of a chill employed in the casting apparatus for casting the heel member of the shoe'last.

. Figure 5 is a perspective view of another part illustrated in Fig.

of. the chill employed in the casting apparatus for casting the heel member of the shoe last.

Figure 6 is a fragmentary top plan view of the drag, core and associated partsof the apparatus for casting the heel member of the shoe last.

Figure 27' is a vertical longitudinal sectional view of the heel member casting apparatus taken on line 7-7 of Fig. 6. Y

Figure 8 is a vertical transverse sectional view of the heel member casting apparatus taken on line 8-8 of Fi 6.

Figure 9 is' a perspective view ofthe three part chill assembled in operative relation.

Referring" to the drawings, which illustrate one embodiment of 1 the invention, and particularly to Figs; 1 to l, the numeral 20 designates ahollow aluminum shoe last to be cast which comprises a toe member21 and a heel member 22, which are pivotally interconnected. The joint face 23 of the toe member 21 has a semi-cylindrical knuckle 24 projecting therefrom intermediate the sides thereof and adjacent the lower face thereof, the axis of said knuckle extending'transversely of the joint face. On opposite sides'of said knuckle, and

concentric therewith, are provided recesses 25 which are axially aligned with knuckle-24. The

joint face 26 of the heel member 22 has a pairof spaced, aligned semi-cylindrical knuckles 2'? projecting therefrom at opposite sides thereof to fit into the recesses 25 of'the toe member. A recess 28 concentric with or in axial alignment with knuckles 27and formed between said knuckles,'is provided in said joint face to receive knuckle 24 of the toe member of the last. Knuckles 2'? have aligned central apertures 29 formed therein, and

knuckle '24 has a hard metal sleeve 30 centrally imbedded therein,'and the apertures 29 receive a joint pin 31 which is journaledin said sleeve 30. Theportions of joint face 26 of the heel member above and'below knuckles 27 extend in angularly disposed planes, whereby they limit the extent of pivotal movement of the shoe last parts.

Inte'grally formed with heel member 22 is .a pocket member 32 whose mouth opens at the recess 28. "This pocket mounts .a coil spring 33 24 of'th'e toe member. A radial bore or opening 35, whoseaxis extends at an angle to the axis of pocket '32 when'the last parts are positioned as of the toe member, and in this bore 35 is fixedly disposeda hard metalball 36 which partially projects from the knuckle 24. The last members are relatively pivotalabout pin 31, said pin being carried by knuckles 27 and journaled in sleeve 1, is formed: in the knuckle 24 I which urges a hard metal ball 34 against knuckle shape.

casting the heel member of the shoe last as illustrated and heretofore described herein, although it will be understood that this apparatus may be adapted for the casting of the joint face of any desired member which is to be provided with spaced axially aligned knuckles and an intermediate axially aligned recess, including the pocket member 32. w i

The apparatus utilizes a flask comprising a drag 40 and a cope 41, each of which is filled with formable'material 42, such as sand, which is firmly packed therein. A longitudinal shoulder 43 is carried by and projects outwardly' of the face'of each of the longitudinal sides of the drag,

} and these shoulders 'support'a frame 44. which "25 portion of its extent, but which carries a plurality of inwardly directed portions 45 which enis spaced from the sides of thedrag for the major gage the drag to position frame 44 in the exact required relation to the drag. A clamp 46 is carried bythe frame 44 to support an arbor 47 on which a core 48 is mountedsaid arbor-passing through. suitable registering. recesses in the drag and cope. Core-48 isdisposed in a mold impression 49 formed in forinable material 42 of the drag and cope. Thedrag and cope each mount, imbedded in the sand thereof, and operatively held by said sand, one part of .a' two-part chill 50, and themoldiimpression 49 is formed in said drag and cope to expose. at least a portion of said chill, whereby the chill forms at least one face of said mold impression.

Each part of the chill 50 comprises a horizontal plate 51 and verticalplates 52. and 53 which are relatively angularlydisposed, the plates 51 of the chill parts being disposed in face contactingengagernent when 'the parts are operatively assembled, and the plates 52 and 53 of each part being aligned with the similar plates of the other chill part when the'chill parts are operativelyassembled. The portion of each chill part intermediate plates 52 and 53 is of arcuate cross sectional shape with its center substantially coincident with the lineof intersection of the planes of the outer faces of plates 52and 53; and provides vertical recess 54 between said plates 52 and 53. In

the plate 51 of each chill part is formed a'transverse recess 55 of rectangular cross sectional shape, the width of .said recess 55 being substantially equal to the diameter of recess 54 and terminating in alignment with the outer face of plate 52. By .this construction a shoulder 56 is formed between said recess 55 and plate 53, the inner face of said shoulder being of farcuate The depth of recess 55 slightly exceeds the'dimension of one-half the axial thickness of knuckle 24. of the toe member ofthe shoe. last.

iAIprojection 57 of plate51 is provided at the side thereof opposite 'plates'52 and 53, and recess'55 is extended intotsaid' projection. Races 55 is adapted to receive a third elongated chill part 58 which is provided w'ith'anarcuate end 59. This 'arcuate end 59 engages shoulder 56 and is operama positioned therebyin a manner whereby .said a'rcuateendf59 is concentric with'arcuate recess" 54'. Chill part 58 has integrally forme'd therewith a tapered member 60, of circular cross section, which projects therefrom in the direction of the length thereof. On the end of the meme ber 60 is provided a projecting tapered pin 61', all

for purposes to be hereinafter set forth;

In the casting of the heel member of the last, j

the core 48 is operatively and accurately positioned in the portion of the moldirnpression '49 7 formed in the drag by means of 'arbor' 4'7 and frame 44. The heel forming core hasa recess or, pocket formed therein which opens in the direction ofchill' 50. Chill part 58 is then in-',

serted in recess 55 of chill 50 with its ar'cuate end 59 bearing on shoulderg56 of said chill, in which position thetapered members 60 and 61 carried thereby extend centrally into the pocket 65 of.

said core, with the portion 61 of said chill part 58 preferably bearing on the end of sand core pocket 65. Chill part 58 is of a length to project outwardly of the flask members through registering recesses 62 formed therein and is provided at the end thereof ,exte'riorly of said flask withan aperture 63 or the like. The cope is then mounted onthe drag in registering rela tion thereto, and the metal-is poured into vthe mold impression. When the metal has set, the' chill part 58 is shifted outwardly in chill recess 55 by means of any suitable tool which obtains a purchase on the chill part by the aperture 63. The chill part 58 need not be entirely removed relation to. the recess 28 and pocket35 'of the casting which it molds and thus preventsjshrink ing of the cast metal into gripping engagement therewith as the metal cools. The metal enter ing recesses 54 of the chill parts forms knuckles '27, and the chill part 58 outlines the shape of recess 28 of the last between said knuckles, and. also the bore of the pocket. 32 formed by the metal which enters pocket 65 of the core .48. ;;'-I he tapered member 61 of chill part 58 formsan opening in the inner end of;:pocket member 32 -30 from the flask as long as it is shifted into spaced 7 of the lastpartand also serves to prevent the formation of air holes in said pocket member 32. 1

Itwill' also be seen thatithe longitudinal withjdrawal of chill part 58 removes the overhanging portion of the chill with respect wane lower 1 portion of the casting and thusrenders' simple,

the matter of removal of the finished casting from the flask. When cast,-. the heel part of the last is thus complete, except. for the finishingof the surfaces other than the:joint faces thereof,

and for the drilling of the holes 29 which re-:

ceive the last pivot pin 31.

It will thus be seen that, byjthe use of apparatus, the heel part of a shoe last as illusbe cast with the knuckles and recess thereofformed integrally with the casting; and, v t'o- .L- gether with theremainder of the joint face of the casting, finished and somewhat hardened by the .trated, or any other member provided with spaced aligned knuckles and an intermediate recess, may' three part Chill. 1 The finishing'of the joint surgfaces in the casting operation assures uniform ity of the jointsgand also provides a starting point a from which the operation of machin'e'flnishing the remainder of the last parts/may bef Calilfled operation. Another advantage obtainedbythe 011, thus simplifying the problem involved inprol viding work holders for the machine use of this apparatus is thatone'set ofchills sufices' for the casting of Lthe'last parts ';of' all size's'andshapes of lasts desired; the'only requirement being that-the mold impression'sbe' properly formed with relation-.tolthechllls to provide'ithe proper positioning of the joint parts on the joint face of the member to be cast.

A slightly modified form of chill is illustrated in Fig. 9, the modification relating to the transverse dimension of the chill part 58 with relation to the recess 54, the width of said chill part 58 being slightly greater than the transverse dimension-of saidrecess 54 whereby the knuckle receiving recess 28 formed thereby in the casting is of slightly greater radius than the knuckles 2'7 thereof, whereby the knuckles 24. and 27 of the toe and heel members of the last may be of the same radius. This modification also eliminates the shoulder 5601" the chill, and requires the use .of other means (not shown) for positioning the chill part 58 in accurate desired relation to chill parts 56. V

The invention having been set forth, what is claimed as new and useful is:-

1. In an apparatus for casting a part of a hollow metal shoe last, a flask having an impression of said shoe last part formed therein, a core positioned in said impression, said core having a pocket formed therein, a chill mounted in said flask to form at least one face of said impression, the face-forming portion of said chill having a recess formed therein, said chill and flask having a passage therein intersecting said recess, and a second chill mounted in said passage to project into said impression and core pocket at one end to provide saidshoe last part with a pair of spaced knuckles cast in said chill recess and an intermediate recess and a pocket communicating therewith cast in said core pocket and against said second chill, said second chill terminating outwardly of said flask at its other end.

2. In an apparatus for casting a part of a hollow metal shoe last, a flask having an impression of said shoe last part formed therein, a core positioned in said impression and having a recess formed therein, a chill mounted in said flask to form at least one face of said impression, the face-forming portion of said chill having a recess formed therein, said chill and flask having a passage therein, and a second chill mounted in said passage to project into said impression and adjacent said core recess at one end and outwardly of said flask at its other end, whereby said shoe last part is provided with a projection cast in said chill recess and a recess cast in said core recess and against said second chill.

3. A. chill for casting the joint face of a part of a jointed member, comprising a pair of complementary parts, having a pair of aligned surfaces and a pair of aligned recesses formed in said surfaces, and a third part carried by at least one of said complementary parts to project outwardly of said surfaces in intersecting relation to said recesses, whereby the joint face to be cast is provided with at least one joint knuckle cast in said recesses and a recess aligned with said knuckle and formed by said third part.

4. A chill for casting the joint face of a jointed member, comprising a two-part chill having a pair of aligned surfaces and a pair of aligned recesses formed therein, each chill part having a second recess formed therein extending angularly of and opening into said aligned recesses, said last named recesses being arranged in registering relation, and another chill mounted in said last named registering recesses and shiftable therein to proj eot outwardly of said surfaces.

5. In an apparatus for casting a part of a jointed metal shoe last, a flask having an impression of said shoe last part formed therein,

' a chill mounted in said flask and forming a portion of the wall of said impression, said chill having an elongated recess formed in the wallforming portion thereof, the faces of said chill on opposite sides of said recess extending in angularly disposed planes, said chill having a passage therethrough opening into said recess, and a second chill shiftably mounted in said passage and projecting into said impression, whereby said shoe last part is provided with a pair of relatively angularly disposed faces cast against said chill, spaced projections intermediate said angular faces cast in said recess, and a recess intermediate said projections.

65. In an apparatus for casting a part of a jointed metal shoe last, a two-part flask having an impression of said shoe last part formed therein, a chill for casting the joint face of said shoe last .part and comprising a pair of complementary parts imbedded in said flask parts and having a pair of aligned surfaces and a pair of aligned recesses formed in said surfaces, and a third chill part carried by at least one of said complementary parts to project outwardly of said surfaces in intersecting relation to said recesses, whereby the joint face of said shoe last part is provided with at least one joint knuckle cast in said recesses and a recess aligned with said knuckle and formed by said third part.

'7. In an apparatus for casting a part of a jointed metal shoe last, a two-part flask having an impression of said shoe last part formed therein, a chill for casting the joint face of said shoe last part and comprising a pair of complementary parts imbedded in said flask parts and having a pair of aligned surfaces and a pair of aligned recesses formed in said surfaces, and each chill part having a second recess formed therein extending angularly of and opening into said aligned recesses, said last named recesses being arranged in registering relation, and another chill mounted in said last named registering recesses and shiftable therein to project into said impression and beyond said surfaces.

GEORGE C. CLARK. 

